eye relief


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eye relief

The distance between the human eyeball and the eyelens of an eyepiece at which the observer can see clearly the full field of view. This is when the exit pupil corresponds with the pupil of the eye. Low-power eyepieces usually have good eye relief and high powers very little. An observer who must wear spectacles may find it difficult to use the higher powers.

eye relief

The distance from the eyeball to the eyepiece of night vision goggles.
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Other features that make a fixed power scope attractive are ease of mounting, constant eye relief and holding zero.
VERACITY 2-10X42MM MANUFACTURER Burris MAGNIFICATION 2X to 10X OBJECTIVE LENS DIAMETER 42mm TUBE DIAMETER 30mm EYE RELIEF 3.5 to 4.25 in.
Magnification affects FOV, but so do ocular lens diameter and optimal eye relief. With your eye in aiming position, a cone of view extends from your pupil to the lens perimeter.
Models include a wide-angle field of view, PASSIONdrop hydrophobic lens coatings, GPObright high-transmission lens-coating technology, extended eye relief and close-focus capabilities.
The product is designed to provide dry eye relief, by decreasing evaporation on the ocular surface with a patented polymer blend formulated to mimic the lipid layer of the tear film.
When shooting from "position" and slung into the rifle, traditional scope mounts are too high for a good cheek weld and do not allow the scope to be moved forward for correct eye relief. These Super Precision High-Power Mounts were designed with an ultra forward scope position and a 1.300" height above the Picatinny rail, which will allow scopes such as the Nightforce Comp SR 4x24 to be effectively used.
Eyeglasses versus no eyeglasses is important because it affects eye relief, and readers should view the following results with that in mind.
Waterproof, fogproof, and weighing 43 oz., the 15x56s offer 17.8mm of eye relief (twist-up eyecups) and a field of view of 236' at 1,000 yards.
Unlike many of the more popular fixed 4X AR optics, the Accelerate has over 3 inches of eye relief. Positional shooting or using this optic on a large-frame AR will not be a problem.
PROS PRICE, LIFETIME WARRANTY, GENEROUS EYE RELIEF CONS STIFF ZOOM ADJUSTMENT
Two 10X models are offered, with field stops of 18 mm and 22 mm, and eye relief of 19.85 mm and 20 mm, respectively.
The time-honored solution to this ergonomie difficulty is to combine an eyepiece of moderately long focal length (and thus comfortable eye relief and an eye lens of reasonable diameter) with a Barlow lens or other image amplifier that doubles or triples the magnification.